抄録
In this papers the author investigated the change of chemical properties, above all the nitrogen fertility, in the maturing process of newly reclaimed soils, Mikatagahara Sizuokaken, under cultivation. The results are summerized as follows : (1) In the process of cultivation, the nitrogen fertility without reference to the period of cultivation. The type of comsuming process of nitrogen fertility is closely similar to the case of the soils, Koibuchimura Ibaragiken. (2) In the process of cultivation, and there is scarcely change in the amount of total nitorogen, but total carbon decreases gradually, and C/N ratio becomes near 10,that is the ratio of humus. (3) After reclamation the amount of exchangeable calcium increases, and acidity neutralized in proportion to the time of period in which the soil is cultivated.
